mirror of
https://github.com/torvalds/linux
synced 2024-10-27 05:39:25 +00:00
bd27fa44e1
Modelling the RESET line as a regulator supply wasn't a good idea as it kind of abuses the regulator framework and also makes adaptation code more complex. Instead, manage the RESET gpio line directly in the driver. Update the device tree binding information. This also makes us easy to migrate to a dedicated GPIO RESET controller whenever it becomes available. Signed-off-by: Roger Quadros <rogerq@ti.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
134 lines
3.1 KiB
C
134 lines
3.1 KiB
C
#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/dma-mapping.h>
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#include <linux/usb/otg.h>
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#include <linux/usb/usb_phy_gen_xceiv.h>
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#include <linux/slab.h>
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#include <linux/clk.h>
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#include <linux/regulator/consumer.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include "am35x-phy-control.h"
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#include "phy-generic.h"
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struct am335x_phy {
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struct usb_phy_gen_xceiv usb_phy_gen;
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struct phy_control *phy_ctrl;
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int id;
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};
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static int am335x_init(struct usb_phy *phy)
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{
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struct am335x_phy *am_phy = dev_get_drvdata(phy->dev);
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phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, true);
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return 0;
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}
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static void am335x_shutdown(struct usb_phy *phy)
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{
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struct am335x_phy *am_phy = dev_get_drvdata(phy->dev);
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phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, false);
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}
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static int am335x_phy_probe(struct platform_device *pdev)
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{
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struct am335x_phy *am_phy;
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struct device *dev = &pdev->dev;
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int ret;
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am_phy = devm_kzalloc(dev, sizeof(*am_phy), GFP_KERNEL);
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if (!am_phy)
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return -ENOMEM;
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am_phy->phy_ctrl = am335x_get_phy_control(dev);
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if (!am_phy->phy_ctrl)
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return -EPROBE_DEFER;
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am_phy->id = of_alias_get_id(pdev->dev.of_node, "phy");
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if (am_phy->id < 0) {
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dev_err(&pdev->dev, "Missing PHY id: %d\n", am_phy->id);
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return am_phy->id;
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}
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ret = usb_phy_gen_create_phy(dev, &am_phy->usb_phy_gen,
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USB_PHY_TYPE_USB2, 0, false);
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if (ret)
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return ret;
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ret = usb_add_phy_dev(&am_phy->usb_phy_gen.phy);
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if (ret)
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return ret;
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am_phy->usb_phy_gen.phy.init = am335x_init;
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am_phy->usb_phy_gen.phy.shutdown = am335x_shutdown;
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platform_set_drvdata(pdev, am_phy);
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return 0;
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return ret;
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}
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static int am335x_phy_remove(struct platform_device *pdev)
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{
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struct am335x_phy *am_phy = platform_get_drvdata(pdev);
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usb_remove_phy(&am_phy->usb_phy_gen.phy);
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return 0;
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}
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#ifdef CONFIG_PM_RUNTIME
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static int am335x_phy_runtime_suspend(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct am335x_phy *am_phy = platform_get_drvdata(pdev);
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if (device_may_wakeup(dev))
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phy_ctrl_wkup(am_phy->phy_ctrl, am_phy->id, true);
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phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, false);
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return 0;
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}
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static int am335x_phy_runtime_resume(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct am335x_phy *am_phy = platform_get_drvdata(pdev);
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phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, true);
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if (device_may_wakeup(dev))
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phy_ctrl_wkup(am_phy->phy_ctrl, am_phy->id, false);
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return 0;
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}
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static const struct dev_pm_ops am335x_pm_ops = {
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SET_RUNTIME_PM_OPS(am335x_phy_runtime_suspend,
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am335x_phy_runtime_resume, NULL)
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};
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#define DEV_PM_OPS (&am335x_pm_ops)
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#else
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#define DEV_PM_OPS NULL
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#endif
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static const struct of_device_id am335x_phy_ids[] = {
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{ .compatible = "ti,am335x-usb-phy" },
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{ }
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};
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MODULE_DEVICE_TABLE(of, am335x_phy_ids);
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static struct platform_driver am335x_phy_driver = {
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.probe = am335x_phy_probe,
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.remove = am335x_phy_remove,
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.driver = {
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.name = "am335x-phy-driver",
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.owner = THIS_MODULE,
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.pm = DEV_PM_OPS,
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.of_match_table = am335x_phy_ids,
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},
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};
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module_platform_driver(am335x_phy_driver);
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MODULE_LICENSE("GPL v2");
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